The Finite Element Method In The Local Stress Calculation Of The Chemical Equipment

Calculation of local stresses is a common problem during the design of pressure vessel and equipment. Excessive local stresses need to be considered because they may cause excessive local deformation due to overloads, or fatigue failure under alternating loads, endangering the safety of vessel and equipment. The complete paper focused on the calculation and analysis of local stresses. Numerical calculation is used in stress. Design by tress analysis method and the classical theoretical analysis were adopted. Meanwhile, the pressure vessel design The Direct Route is study. To some extent the numerical results is validated by experiment. The Structure of selected studies are often encountered in engineering practice, but the structure of non-standardized. For example:take over the conical shell with large diameter tapered section, to take over the area cut container shell, Tapered section of tower and so on. Also frequently encountered fatigue in the actual is done some research, and illustrated by an engineering example. Furthermore, the design method of external pressure vessel make a summary, and the new design method of external pressure vessel are illustrated by the numerical calculations. The stress distribution of these important structures is obtained by calculating, and the stress was classified, using different criteria to limit, so that these engineers have a better grasp about the strength. This will enable the design of the structure is to ensure the security, but also more economical. The numerical explained of new external pressure design make engineers fully understand the underlying causes of new methods, and have a better grasp of the design.